public class Test {
    public static void main(String[] args) {
        SingleLinkedList list = new SingleLinkedList();
        list.addFirst(5);
        list.addFirst(5);
        list.addFirst(5);
        list.addFirst(5);
        list.addIndex(3,5);
        list.removeAllKey(5);
        //list.remove(2);
        list.display();
    }
}
